<head>
  {%- if site.google_analytics and jekyll.environment == 'production' -%}
    {%- include google_analytics.html -%}
  {%- endif -%}
  
  <!-- Robots -->
  <meta name="robots" content="{{- page.robots | default: 'index, follow' -}}" />
  {%- unless page.canonical == false -%}<link rel="canonical" href="{{- page.url | absolute_url -}}" />{%- endunless -%}
  
  <!-- Title, description, author -->
  {%- capture _page_title -%}
    {%- if page.title -%}{{- page.title | append: ' | ' -}}{%- endif -%}
    {{- site.title | default: "Untitled Website" -}}
    {%- if site.subtitle -%}{{- site.subtitle | prepend: ' - ' -}}{%- endif -%}
  {%- endcapture -%}
  {%- assign _page_title = _page_title | escape -%}
  {%- assign _page_description = page.description | default: site.description | default: _page_title | escape -%}

  <title>{{- _page_title -}}</title>
  <meta name="description" content="{{- _page_description -}}" />
  <meta name="author" content="{{- site.author -}}" />
  
  <!-- Open Graph -->
  <meta property="og:title" content="{{- _page_title -}}" />
  <meta property="og:type" content="website" />
  <meta property="og:image" content="{{- site.avatar | absolute_url -}}" />
  <meta property="og:url" content="{{- page.url | absolute_url -}}" />
  <meta property="og:site_name" content="{{- site.title | escape -}}" />
  <meta property="og:description" content="{{- _page_description -}}" />
  
  <!-- Styles -->
  <meta charset="utf-8" />
  <meta name="viewport" content="width=device-width, initial-scale=1" />
  <!--[if lte IE 8]><script src="{{- 'assets/js/ie/html5shiv.js' | relative_url -}}" defer></script><![endif]-->
  <link rel="stylesheet" href="{{- 'assets/css/main.css' | relative_url -}}" />
  <!--[if lte IE 8]><link rel="stylesheet" href="{{- 'assets/css/ie8.css' | relative_url -}}" /><![endif]-->
  <!--[if lte IE 9]><link rel="stylesheet" href="{{- 'assets/css/ie9.css' | relative_url -}}" /><![endif]-->
  <link rel="stylesheet" href="https://use.fontawesome.com/releases/v5.1.0/css/all.css">

  <!-- Scripts -->
  <script src="https://ajax.googleapis.com/ajax/libs/jquery/1.11.3/jquery.min.js" defer></script>
  <script src="{{- 'assets/js/jquery.scrolly.min.js' | relative_url -}}" defer></script>
  <script src="{{- 'assets/js/jquery.scrollzer.min.js' | relative_url -}}" defer></script>
  <script src="{{- 'assets/js/skel.min.js' | relative_url -}}" defer></script>
  <script src="{{- 'assets/js/util.js' | relative_url -}}" defer></script>
  <!--[if lte IE 8]><script src="{{- 'assets/js/ie/respond.min.js' | relative_url -}}" defer></script><![endif]-->
  <script src="{{- 'assets/js/main.js' | relative_url -}}" defer></script>

</head>